80 OM Centrif Micro ΙΙ-5
Fault
Code
Description Detailed Description of Fault / Possible Solutions
Verify that input power is three phase. Correct wiring if necessary.
Low voltage below the Undervoltage Trip Level parameter setting (PFN
08, P31) was detected for longer than the Over/Under Voltage Trip delay
time (PFN 09, P32).
Verify that the actual input voltage level is correct.
Verify that the Rated Voltage parameter (FUN 05,
P66
) is set correctly.
Check input supply for open fuses or open connections.
F21
F22
F23
Low Line L1-L2
Low Line L2-L3
Low Line L3-L1
On medium voltage systems, verify wiring of the voltage measurement
circuit.
High voltage above the Over voltage Trip Level parameter setting (PFN
07, P30) was detected for longer than the Over/Under Voltage Trip delay
time (PFN 09, P32).
Verify that the actual input voltage level is correct.
Verify that the Rated Voltage parameter (FUN 05,
P66
) is set correctly.
F24
F25
F26
High Line L1-L2
High Line L2-L3
High Line L3-L1
Line power quality problems/ excessive line distortions.
The D3 control has detected the loss of one or more input or output
phases when the starter was running. Can also be caused by line power
dropouts.
Check input supply for open fuses.
Check power supply wiring for open or intermittent connections.
Check motor wiring for open or intermittent connections.
F27 Phase Loss
On medium voltage systems, verify wiring of the voltage feedback
measurement circuit.
No input voltage was detected for longer than the Inline Configuration
time delay parameter setting (I/O 15, P53) when a start command was
given to the starter.
Check input supply for open disconnects, open fuses, open circuit
breakers, or disconnected wiring.
F28 No Line
On medium voltage systems, verify wiring of the voltage feedback
measurement circuit.
During operation, the D3 controller detected a very high level of current in
one or more phases.
Check motor wiring for short circuits or ground faults.
Check motor for short circuits or ground faults.
F30
I.O.C.
(Instantaneous
Overcurrent
Current)
Check if power factor or surge capacitors are installed on the motor side
of the starter.
Motor current exceeded the Over Current Trip Level setting (PFN 01,
P24) for longer than the Over Current Trip Delay Time setting (PFN 02,
P25).
F31 Overcurrent
Check motor for a jammed or an overload condition.
Motor current dropped under the Under Current Trip Level setting (PFN
03, P26) for longer than the Under Current Trip Delay time setting (PFN
04, P27).
F34 Undercurrent
Check system for cause of under current condition.
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